Slider



June 6, 1939.

B. P. LAWSON SLIDER Filed Dec.

INVENTOR. -95wdaall$=1auzsan ATTORNEY.

Patented June 6, 1939 I alanine TENT joFrlcE;

sunnn Birdsall P. Lawson, New York, N. Y., assignor to Ideal FastenerCorporation, Brooklyn, N. Y., a corporation of New York ApplicationDecember s, 1937, Serial No. 1so,21o I 4 Claims. (Cl. 24-205) Thisinvention relates to improvements in sliders for slide fastenerassemblies incorporating fastenerelements or scoops mounted in offsetrelation with respect to the tapes, 5 Broadly, it is an object of thisinvention to pro,-

' vide, in a slide fastener assembly, wherein the fastener elements aremounted so as to normally rest in a plane angular with respect to theplane of the tape, for a-slider of a construction and operation as toprovide for interlocking and separation of the fastener elements onrespective tapes in the transverse plane of the tape and that of theslider common thereto. t Specifically, it=is an object of this inventionto provide for a novel construction of the lead end of a slider, wherebythe slide fastener elements angularly mounted with respect to thetransverse plane of the tapescarrying the same, acted upon.

bythe slider, are displaced-into the transverse plane of the tape andthe'slider, both being com- "mon, as-the fastener elements enter into.the

channels or guideways .of the slider, thus providing for the dispositionof the fastener elements in a. requisite :plane' for interlocking orseparation-by and within the slider.

These and other advantages, capabilities and features of the inventionwill appear from the 1 Figure3 is a'frontelevation partially in sectiona taken along lines 33 of Figure 1.

Figure 4 isga' perspective view of the slider. j .40 Figure 5 is .a planviewlookingupwards of the U slider. I

Referring to the reference characters in the drawing, numeral :10,represents a slider reciproeating upon cooperating stringersl Ia and Ilb,- r 45 the flexible tapes 12a 'andIZb ofrwhich carry scoops Ila andIlb,--said -scoops:being clamped as shown inFigure 2'fof -thei drawingto theflexible beads 13a and I 3b at the' ends of. the tape.

As is indicated in Figure 2, the central trans- 50 verse plane of thetapes In and I2!) is horizontal:

' shaped to 'providea cut-out in; the :nature ofar- 'for the purpose "ofthe embodiment herein illustrated, while the scoops Ila and Ilb, asclamped ,to the beads of the tapes, have their transverse central planenormally at an angle with respect 55 to that of the-tapes; thetransverse plane of the slider is the same as that of the tapes, herebeing horizontal.

As'shown in Figure 3, the scoops Ila and Ilb when interlocked throughthe mating of their I male and female cooperating elements I5 and I6, 5are desired and required to be in a horizontal central transverse planeparallel to that of the tapes I21; and I21). i

As shown in Figure 1, which presents a worms-eye perspective view of thestringers as 10 the same are acted upon by the slider III to interlockor separate the same, the upper-portion ,of

said view shows the normal positioning of the opposing stringers withthe central transverse plane of the scoops at an angle to the centraltransverse plane of the tapes carrying thesame, while at the lowerportion of such view the interlocked scoops have their centraltransverse plane parallel to that of the tapes and the slider.

As shewn in 1, 4 and 5, the slider con- 20 sists of a plurality ofopposing wings I! and I8, here shown as formed by stamping ordie-casting, the upper wing I'-I being narrower than the lower wing. I8,the being united atone end by an integral connector post I9 adjacentwhich 25 there is disposed a separator member. 2!! of triangularformation, to provide a plurality of divergent channels 2Ia'and 2Ibhavinga slightly larger and symmetrical cross-section than the scoopspassing therethrbugh, and having afhorizontal transverse plane, thediverging channels leading into a single or merging channel 22, so as toprovide for the'usual interlock and separator action, whereby opposingstringer series Ila and Nb may be interlocked or separated, dependentupon the directional reciprocation of the slider.

A handle portion 23 :forming an integral extension of the connector postI9 extends above wing I! and across the length thereof, and-upon which.handle thereyis mounted'thetab -2l for 40 permitting the gripping andactuation of the slid- .ers in thedesired direction.

The lower 'wing I8 has upstanding walls 25a v andg25bjofheightapproximately that of the scoops Ila and-Ilb; while the, upper.wing I1 is 4:5

faces of wings I1 and l8 are symmetrical and in parallel: planes; exceptthat. the lower wing I 8 I is 60 21a and 21b defining the cut-out beingbevelled or inwardly curved. The upstanding wall formations 25a and25b'of the wing it have a flared contour at their extremity, providingcontacting edges or projections for tripping the scoops, as will belater described.

As shown in Figure 1, as the slider i0 is displaced in the direction ofthe arrow, the leading edges or projections 28a and 28b of the walls 25aand 25b ofthe lower wing are adapted to contact with the upper portionof the clamping arm as at29a and 29b of the scoops Ma and Nb and as theslider is moved, to displace the scoops mounted in spaced'relationshipon the resilient tape, so that each of the scoops is displaced from itsnormal transverse central plane angular to the tape to a centraltransverse plane parallel to the tape; the cut-out segments 26a and 26bbeing of such extent that none of the remaining surfaces of the scoop,contact or impinge upon any surface of said lower wing during suchangular displacement of the scoops; thereafter, the

scoops being in the transverse plane of the slider channels, furthermovement of the slider causes directiveguida'nce of the scoops in thechannels .251: and 25b of the lower wing, are to a progressivedecreasing degree displaced or twisted from .the angular-centraltransverse plane with re ,spect to the tape to a plane less angular,with .the result that as successive scoops are contacted by thecontacting edges 28!; and 28b at the leading end of the wing I8, thescoops are more nearly in a position so that their central transverseplane is parallel to the normal tape plane; with .the result that thescoops as: they enter into the divergent channels 2 la and 2lb betweenthe wings, are in the proper horizontal central trans- 7 Verse planedesired for interlocking, which said interlocking takes place as thescoops of respective stringers passing the separating. post de- "finingthe divergent channels and enter into the single channel 22 where, theyare presented with a central transverse plane parallel to thecorresponding plane of the tape and of the channels of the slider.

It should be pointed out that conversely, when the slider is reversed inits motion to-that direction shown by the arrow of .Figure l, theinterlocked scoops as they are separated by the separator post inpassing from the merging to the diverging channels, and attain that zoneof the lower wing l8 defining the cut-out segment, the tension on thetapes having been released, return to their normal angular position withrelation to their central transverse planes and that of the tapes.

' It is obvious that various changes and modifications may be. made 'tothe details of construction without departingv from the general spirit.

snare ing a body portion formed ofopposing wings, one above the other,spaced to provide diverging channels merging into a single channel, saidchannels having their axes parallel to and below the transverse plane ofthe tapes, and means on one of said wings at the leading end of thediverging channels for displacing the scoops from the normal angularposition aforesaid to that wherein their central transverse planes arein parallelism to that of the tapes upon actuation of said slider.

2. In' combination with flexible interlocking stringers incorporatingscoops normally mounted in a central transverse plane angular to that ofthe flexible tapes carrying the same, a slider comprising upper andlower spaced wings and a post connecting the same to provide divergingchannels merging into a single channel, the channels having their axesparallel to and below the transverse plane of the tapes, and formationson the lower of said wingsat the leading end of the diverging channelsdefined thereby, and acting on the scoops upon entry of the sametherein, for

displacing such scoops from their normal position aforesaid to onewherein their central transverse plane is parallel to that of the tapes,upon actuation of said slider.

3. In combination with flexible interlocking stringers, incorporatingscoops normally mounted in a central transverse plane angular to that ofa plurality of spaced wings, and a post connecting the same to definediverging channels merging into a single channel, said channels havingtheir axes parallel to and below the transverse plane of the tapes, oneof the wings at its end defining the diverging channels having a cut outformation and a projection thereadja'cent, the other wing extendingopposite the projection and a cut out formation, the projection on said-the tapes carrying the same, a slider comprising first named wingserving on displacement of the slider to contact with and act upon ascoop entering into the leading end of the diverging channels as thesame rests above the cut out formation of said wing to displace saidscoop from its angular planeof mounting on the tape aforesaid to thatwherein its central transverse plane is in parallelism to that of thetape.

- 4. In. combination with flexible interlocking stringers, incorporatingscoops normally mount .ed in a central-transverse plane angular to thatof the tapes carrying the same, a slider comprising upper and lowerwings and a post connecting the same to define diverging channelsmerging into a single channel, said channels having their axes parallelto and below the transverse plane named wing serving on displacement ofthe slider to contact with and act upon a scoop entering into theleading end of the diverging channels as the same rests above the cutout formation of said wing to displace said scoop from its angular'plane of mounting on the tape aforesaid to that wherein its centraltransverse plane is in parallel ism to that of the tape.

' BIRDSALL P. LAWSON.

